MaxBotix MB7851 High-Performance Tank Level Ultrasonic Sensor


In stock

SKU: 1644538
  1. 3V to 5.5V supply with the very low average current draw
  2. 1.95Hz (MB7851) refresh rate
  3. RS232/TTL Serial, 0 to Vcc, 9600 Baud, 81N
  4. Analog voltage output, scaled to (Vcc/1024) / cm
  5. Sensor operates at 42KHz


(Including GST)

In stock

Purchase this product now and earn 150 Robu Points!

Very Low Stock. Order Now !

Have any issues, Get support here.
Have a bulk requirement, mail us to [email protected]
Didn’t Find what you are looking for?

Brand: Maxbotix
Category: MAXBOTIX Ultrasonic Sonar
Tags: Maxbotix

Features of the weather-resistant MB7851, Tank Sensor, include millimeter resolution, short to long-distance detection, range information from 50 mm to 5000 mm for liquid level detection, a ~2Hz read rate, and three simultaneously available outputs: a real-time analog voltage envelope, a scaled analog voltage, and serial communication in either RS232 or TTL format.

The MaxBotix MB7851 Tank Sensor is a low‑cost liquid-level monitoring sensor that uses ultrasonic technology for non-contact sensing. The MB7851 is designed to be an easy-to-use sensor for applications where liquid-level detection is desired. This sensor is great for use in containers that are typically difficult for ultrasonic devices such as tanks, barrels, and bins. This is because the MB7851 has a teaching feature (only available if using serial communication), that can train the sensor to what an empty container looks like. This helps allow the sensor to range properly even in the presence of otherwise detectable obstructions like corrugation.

The MaxBotix MB7851 is factory calibrated to match sensor beam patterns and provide reliable long-range detection zones.

In addition, the MaxBotix MB7851 offers virtually noise-free distance readings through the use of high-output acoustic power combined with continuously variable gain, real‑time background automatic calibration, real‑time waveform signature analysis, and noise rejection algorithms. This holds true even in the presence of many of the various acoustic or electrical noise sources.

  1. Tank level measurement
  2. Environments with acoustic and electrical noise
  3. Liquid Distance Measuring
  4. Industrial sensor –40°C to +65°C

Note: For more technical details go through Datasheet in the attachment section


  1. Real-time auto sensitivity adjustment and noise rejection
  2. High acoustic power output
  3. Precise narrow beam characteristics
  4. Liquid detection includes zero range
  5. 3V to 5.5V supply with the very low average current draw
  6. Free-run operation can continually measure and output range information
  7. 1.95Hz (MB7851) refresh rate
  8. Triggered operation provides the range reading as desired
  9. All interfaces are active simultaneously
  10. RS232/TTL Serial, 0 to Vcc, 9600 Baud, 81N
  11. Analog voltage output, scaled to (Vcc/1024) / cm
  12. Sensor operates at 42KHz

Package Includes:

1 x MaxBotix MB7851 High-Performance Tank Level Ultrasonic Sensor

SKU: 1644538 Category: Tag:


Frequency (Hz)


Read Rate (Hz)




Max. Sensing Distance (cm)


Operating Voltage (VDC)

3 ~ 5.5

Average Current Consumption (mA)


Operating Temperature (°C)

-40 to 65



Mounting Type

Horn opening: 2″ National Pipe Thread Straight, Sensor connection End: 3/4″ National Pipe Thread Straight

Outer Diameter(mm)


Length (mm):


Nut Size (mm)


Weight (g):


Shipping Weight 0.104 kg
Shipping Dimensions 20 × 12 × 7 cm
3 Month Warranty Against Sealed Product

This item is covered with a standard warranty of 3 Month from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Warranty  Against Sealed Product:

This product comes with manufacturer seal so, warranty Policy shall cover only those issues pertaining to the manufacturing defects in the product. In any other case, No return will be accepted if the seal is broken.

Based on 0 reviews

0.0 overall

Be the first to review “MaxBotix MB7851 High-Performance Tank Level Ultrasonic Sensor”

There are no reviews yet.


Questions and answers of the customers

There are no questions yet. Be the first to ask a question about this product.

Only registered users are eligible to enter questions
Country Of Origin: China